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13. A box of volume V and temperature T contains a mixture of two ideal gasses A and B, whose molecules have masses mA and mB, respectively. Suppose there are […]

12. I place a block in a tub of mercury, and find that 1/4 of its volume is submerged. Now I pour just enough water so that the object is […]

11. A planet of constant density ρ and radius R rotates with period T. Let G represent the gravitational constant. What is the shortest possible period of rotation? Hint: think […]

10. Current is passed through this flexible loop of wire, which is placed on a frictionless insulating table. What will be the resulting effect on the shape of the wire? […]

9. A car of mass 1500 kg is mounted on four suspension springs, one for each wheel. When empty, the car oscillates vertically at a frequency of 3 Hz. When […]

8. I use a lens to form a virtual image of an object, as shown below. What must be done to record this virtual image onto camera film? a. It’s […]

7. I measure the strength of a signal from a radio tower to be 20 uW/m2 at a distance of 2 km from the tower. What is the total power […]

6. I force 200 cm3 of water through a slanted pipe whose cross-sectional area is constant at 10 cm2. The pressure at the pipe inlet is 150 N/cm2 higher than […]

5. I measure time using a pendulum. I find that a pendulum swinging from a fixed support oscillates with a different period than one whose support is accelerated horizontally with […]

4. Unpolarized light is passed through a polarizing sheet. Which of the following statements describes the output beam? a. It is polarized and its intensity is reduced. b. It is […]